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Ipswich Integrated Catchment Plan

Presentation to the Flood Community of Practice

Wednesday 16^th September 2026

I pay my respect to all First Nations peoples, their cultures and to their Elders, past and present

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Context

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ISO 31000:2009 Risk Assessment Process applied to Ipswich LGA Floodplain Management

Understanding Flood Risk

Risk treatment

Risk identification

Risk analysis

Risk evaluation

Property Specific Actions

Emergency Management

Community Awareness and Resilience

Land Use Planning responses

Risk Assessment

Mitigation

Monitoring and Review

Physical Mitigation*

* - includes assessment of water quality and ecosystem health benefits that may be achieved through sustainable physical floodplain mitigation measures

Process

Ipswich Integrated Catchment Plan (IICP)

Phase 4

Options Identification and Assessment

Economic Damages Assessment

Combined Flood Risk

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Queensland Floods Commission of Inquiry

Recommendations

Catchment Flood Studies

Regional flood data

Brisbane River Strategic Floodplain Management Plan (SFMP)

Regionally consistent approach

Phase 2

Phase 3

Data Collection Report

Phase 1

Process

Ipswich Integrated Catchment Plan (IICP)

Phase 4

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A Truly Integrated Plan

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Understanding Flood Risk

Combined Flood Risk

Hydraulic Risk

Time to Inundation

Duration of Inundation

Flood Islands

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Combined Flood Risk

Hydraulic Risk

Time to Inundation

Duration of Inundation

Flood Islands

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Understanding Flood Risk

Economic Assessment – Annual Average Damages Assessment (AAD)
Tangible damages and Intangible damages
Based on flood level information and SFMP stage damage curves

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Annual Average Damages (AAD) is the defining factor of how much flood damages are expected to cost the Ipswich community each year on average. The IICP adopts the SFMP methodology for the flood damage assessment.

Tangible damages are a combination of both direct damages (internal, external and structural damage to a building) and indirect damages (clean up, recovery and potential losses of revenue) and have been calculated with a general degree of accuracy due to several surveys, research and flood events where data has been collected and analysed.

Intangible damages includes the ‘social costs’ of flooding reflected in increased levels of emotional stress and psychological and physical illness including loss of life. Intangible damages also includes environmental, cultural and heritage losses incurred. There are many limitations to creating an exact flood damages figure, such as:

• property floor levels can have a substantial impact on damages figures

• information on the value of commercial building contents was not available

• actual damage in a flood is almost always less than the potential damage.

As a result, these figures do not provide an ‘exact bill’ of costs likely to occur as a result of a flood event. Instead, it helps to understand the magnitude of impact for different events.

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Physical Mitigation

Natural Floodplain Management (NFM)

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Physical Mitigation

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Land Use Planning

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Property Specific

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Community Awareness and Resilience

Aware of flood risk, past flood events, and have a high level of water literacy

Prepared for a flood event, with appropriate steps taken to be ready to respond to a flood hazard

Empowered to respond to the occurrence of a flood event efficiently and effectively

Have high levels of tolerability and resilience, enabling rapid recovery from a flood event

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Emergency Management

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Key - IICP Actions (High and Medium)
Investigating Flood Hazard
FS2, FS6 : City Wide Actions
FS1 : Investigate Flood Damages (Flash Flooding)
FS4 : Update Sandy Creek Flood Model
FS5 : Update Mihi Creek Flood Model
Physical Floodplain Mitigation
FM1 : Inland Freight Route / Upper catchment dry flood mitigation dams
FM2 : Warrill Creek NFM (Major & Minor)
FM3 : Bundamba Creek NFM (Major & Minor)
Community Awareness and Resilience
CR1-3: City Wide - Aligning Community Awareness Campaigns with QRA Resources
CR4 : CAR Implementation - City Wide Actions
CR5 : CAR Implementation - Goodna Case Study Suburbs
CR6 : CAR Implementation - Targeting High-Flood Risk
Emergency Management
EM1 - EM10 : City Wide Actions
EM3 : New Forecast Location - Loamside
EM4 : New Forecast Location - RAAF Base Amberley
EM6 : Improved Warning System - Flash Flooding (Six Mile, Goodna and Deebing Creeks)
EM23 : Resupply and Refuge Station – Karalee & Leichhardt
EM27 : City Wide - Share Alert Polygons with QFES
Land Use Planning
LUP : City Wide Actions
Property Specific Actions
PS4 – PS8 : City Wide Actions

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IICP Technical Report and Strategy

www.ipswich.qld.gov.au

Search: Ipswich Integrated Catchment Plan

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Acknowledgements

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